Me and Science

I became interested in the physics of light during my study at the Technische Universität Hamburg-Harburg (TUHH), Hamburg, Germany. There I was involved with light propagation and localisation in photonic crystals (PhCs) waveguide and cavity. Since then my work has been in the field of optics (2D and 3D PhCs), branching out into plasmonics and metamaterials, and most recently into thermoelectric materials. Below you will find some of my work.

 

Book Chapters

2013

[1] Recent advances in nearfield optical analysis and description

of amorphous metamaterials

W. Khunsin and R. Vogelgesng

Ed. Toralf Scharf and Carsten Rockstuhl

Amorphous Nanophotonics, Berlin: Springer Verlang, 2012 (to be published)
Springer.com

 

 

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Peer-reviewed Journals

2017

[24] Self-assembled three-dimensional inverted photonic crystals on a photonic chip

S. Arpiainen, K. Vynck, J. Dekker, M. Kapulainen, W. Khunsin, T. Aalto, M. Mulot, G. Kocher-Oberlehrer, R. Zentel, C. M. Sotomayor Torres, David Cassagne,
and J. Ahopelto

Physica Status Solidi (a), 214, 1700039 (2017)
doi: 10.1002/pssa.201700039

 

 

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[23] Electrochemically modified boron-doped diamond electrode with Pd and Pd-Sn nanoparticles for ethanol electrooxidation

Christos K.Mavrokefalos, M. Hasan, W. Khunsin, M. Schmidt, S. A. Maier, J. F. Rohan,
R. G. Compton, and J. S. Foorda

Electrochimica Acta, 243, 310 (2017)
doi: 10.1016/j.electacta.2017.05.039

 

 

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2016

[22] Quantitative and Direct Near-Field Analysis of Plasmonic-Induced Transparency and the Observation of a Plasmonic Breathing Mode

W. Khunsin, J. Dorfmüller, M. Esslinger, R. Vogelgesang, C. Rockstuhl, C. Etrich
and K. Kern

ACS Nano, 1, 1285 (2014)
doi: 10.1021/acsnano.5b06768

 

 

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2015

[21] Dimensional and defectivity nanometrology of directed self-assembly patterns

C. Simao, D. Tuchapsky, W. Khunsin, A. Amann, M. A. Morris,
and and C. M. Sotomayor Torres

Physica Status Solidi (c), 12, 267 (2015)
doi: 10.1002/pssc.201400211

 

 

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2014

[20] Tetradymites as Natural Hyperbolic Materials for the Near-Infrared to Visible

M. Esslinger, R. Vogelgesang, N. Talebi, W. Khunsin, P. Gehring, S. De Zuani, B. Gompf,
and K. Kern

ACS Photonics, 1, 1285 (2014)
doi: 10.1021/ph500296e

 

 

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[19] Large-area, ordered nanodot ararys by in instu solvent’assisted nanoimprint of a block copolymer

C. Simao, W. Khunsin, N. Kehagias, M. Salaun, M. Zelsmann, M. A. Morris,
and and C. M. Sotomayor Torres

Nanotechnology 25, 175703 (2014)
doi: 10.1088/0957-4484/25/17/175703

 

This work has been selected as the Frontispiece (Cover article) for Nanotechnology Volume 25, Issue 17 (2014) .

 

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[18] Ordered 2D Colloidal Photonic Crystals on Gold Substrates by Surfactant-Assisted Fast-Rate Dip Coating

E. Armstrong, W. Khunsin, M. Osiak, M. Bloemker, C. M. Sotomayor Torres,
and C. O'Dwyer

Small 10, 1895 (2014)
doi: 10.1002/smll.201470059

 

This work has been selected as the Frontispiece (Cover article) of the 10/2014 issue of the journal SMALL.

 

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2013

[17] Epitaxial growth of visible to infra-red transparent conducting In2O3 nanodot dispersions and reversible charge storage as a Li-ion battery anode

M. Osiak, W. Khunsin, E. Armstrong, T. Kennedy, C. M. Sotomayor Torres, K. M. Ryan,
and C. O'Dwyer

Nanotechnology 24, 065401 (2013)
doi: 10.1088/0957-4484/24/6/065401

 

This work has been selected as the cover article for Nanotechnology Volume 24, Issue 6 (2013) and appears as a featured article.

 

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[16] Phase Engineering of Subwavelength Unidirectional Plasmon Launchers

M. Eßlinger, W. Khunsin, J. Dorfmüller, N. Talebi, R. Vogelgesng, and K. Kern

Adv. Optic. Mater. 1, 434-437 (2013)
doi: 10.1002/adom.201300135

 

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[15] Background-free imaging of plasmonic structures with cross-polarized apertureless scanning near-field optical microscopy

M. Eßlinger, J. Dorfmüller, W. Khunsin, R. Vogelgesng, and K. Kern

Rev. Sci. Instrum. 83, 033704 (2012)
doi: 10.1063/1.3693346

 

This work has been for the March 26, 2012 issue of Virtual Journal of Nanoscale Science & Technology.
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[14] Noise-assisted crystallization of opal films

W. Khunsin, A. Amann, G. Kocher, S. G. Romanov,
S. Pullteap, H. C. Seat, E. P. O'Reilly, R. Zentel
and C. M. Sotomayor Torres

Adv. Funct. Mater. 22, 1812-1821 (2012)
doi: 10.1002/adfm.201102605

 

 

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[13] Plasmonic grating as a nonlinear converter-coupler

N. Talebi, M. Shahabadi, W. Khunsin, and R. Vogelgesang

Opt. Express 20, 1392-1405 (2012), doi: 10.1364/OE.20.001392

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2011

[12] Near-field dynamics of optical Yagi-Uda nanoantennas

J. Dorfmüller, D. Dregely, M. Eßlinger, W. Khunsin, R. Vogelgesang, K. Kern, and H. Giessen

Nano Lett. 11, 2819-2824 (2011), doi: 10.1021/nl201184n

 

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[11] Long-distance Indirect excitation of plasmonic resonance

W. Khunsin, B. Brian, J. Dorfmüller, M. Esslinger, R. Vogelgesang,
C. Rockstuhl, D. Dmitriev, K. Kern.

Nano. Lett. 11, 27665-2769 (2011), doi: 10.1021/nl201043v

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2010

[10] Plasmonic Nanowire Antennas: Experiment, Simulation and Theory

J. Dorfmüller, R. Vogelgesang, W. Khunsin, C. Rockstuhl, C. Etrich, and K. Kern

Nano Lett. 10, 2596-2603 (2010), doi: 10.1021/nl101921y

 

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2009

[9] Site-selective self-assemly of Colloidal Photonic Crystals

S. Arpiainen, F. Jonsson, J. R. Dekker, G. Kocher, W. Khunsin,
C. M. Sotomayor Torres, and J. Ahopelto

Adv. Funct. Mater. (2009), doi: 10.1002/adfm.200801612

 

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[8] Resonance amplification of defect emission in ZnO-inverted opal

W. Khunsin, M. Scharrer, L. K. Aagesen, M. A. Anderson, R. P. H. Chang,
C. M. Sotomayor Torres, and S. G. Romanov

Opt. Lett. 34, 1519-1521 (2009), doi: 10.1364/OL.34.001519

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2008

[7] Bleaching-induced evolutio of directional emission from dye-loaded opals

W. Khunsin, S. G. Romanov, M. Bardosova, D. Whitehead, M. Pemble,
I. M. Povey, and C. M. Sotomayor Torres

J. Opt. A: Pure Appl. Opt. 10, 115201 (2008), doi:10.1088/1464-4258/10/11/115201

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[6] Optical transmission in triple-film hetero-opals

W. Khunsin, S. G. Romanov, C. M. Sotomayor Torres, J. Ye, and R. Zentel

J. Appl. Phys. 104, 013527 (2008), doi: 10.1063/1.2951958

This work has been for the March 26, 2012 issue of Virtual Journal of Nanoscale Science & Technology.
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[5] Quantitative analysis of lattice ordering in thin film
opal-based photonic crystals

W. Khunsin, G. Kocher, S. G. Romanov, and C. M. Sotomayor Torres

Adv. Funct. Mater. 18, 1-9 (2008), doi: 10.1002/adfm.200701431

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[4] Rotational symmetry of transmission patterns and ordering of
opal photonic crystals

W. Khunsin, S. G. Romanov, and C. M. Sotomayor Torres

J. Non. Opt. Phys. Mater. 17, 97-104 (2008), doi: 10.1142/S0218863508004020

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[3] Chemosorption-related shift of a photonic bandgap in photoconductive
ZnO inverse opal

W. Khunsin, S. G. Romanov, M. Scharrer, L. K. Aagesen,
R. P. H. Chang, and C. M. Sotomayor Torres

Opt. Lett. 33, 461-463 (2008), doi: 10.1364/OL.33.000461

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2007

[2] Integration of SOI-based 2D and Si-based 3D photonic crystals

G. Kocher, W. Khunsin, J. Romero Vivas, K. Vynck, S. Arpiainen, S. G. Romanov, B. Lange, M. Mulot, F. Jonsson, T. Charvolin, E. Hajdi, D. Cassagne, R. Zentel,
J. Ahopelto, and C. M. Sotomayor Torres

ECS Transaction 6, 133-138 (2007), doi: 10.1149/1.2728851

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[1] Towards Si-based photonic circuits: Integrating photonic crystals
in silicon-on-insulator platforms

G. Kocher, W. Khunsin, S. Arpiainen, J. Romero-Vivas, S. G. Romanov, J. Ye, B. Lange,
F. Jonsson, R. Zentel, J. Ahopelto, and C. M. Sotomayor Torres

Sol. Stat. Electron. 51, 333-336 (2007), doi: 10.1016/j.sse.2007.01.010

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Conference Proceedings

P10   T. Kehoe, N. Kehagias, D. Borah, W. Khunsin, M. Morris, and C. M. Sotomayor Torres
Quantified comparison of ordering in self-assembled block copolymer films of different molecular weights by image analysis method

MRS Proceedings, 2012 accepted

P9    W. Khunsin, J. Dorfmüller, M. Esslinger, R. Vogelgesang, C. Rockstuhl, C. Etrich, F. Lederer, H. Giessen, and K. Kern
Glimpsing non-radiative plasmonic dark modes in the near field: exciting the unexcitable

Proceeding of the 5th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, 2011, 5, 48.

P8     [Invited] R. Vogelgesang, W. Khunsin, B. Brian, J. Dorfmüller, M. Eßlinger, C. Etrich, C. Rockstuhl, A. Dmitriev, and K. Kern
Apertureless near-field optical microscopy investigations of long-range indirect interactions in unordered metamaterials
Proceeding of the 5th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, 2011, 27, 639.

P7     S. G. Romanov, U. Peschel, W. Khunsin, S. Essig, and K. Busch
Polarization anisotropy and cross-polarized transmission in thin film opal-based photonic crystals
Proc. SPIE 2010, 7713, 771304.

P6     [Invited] C. Rockstuhl, C. Etrich, C. Helgert, C. Menzel, T. Paul, S. Fahr, T. Pertsch, J. Dorfmüller, R. Esteban, W. Khunsin, R. Vogelgesang, K. Kern, A. Dmitriev, K. Bittkau, T. Beckers, R. Carius, and F. Lederer
Large scale simulations in the realm of nanooptics
Proc. SPIE 2010, 7604, 76040D.

P5    W. Khunsin, C. M. Sotomayor Torres, and S. G. Romanov
Approaching quantitative optical diffraction analysis of crystal lattices in opal films
Proc. SPIE 2008, 6989, 69890K.

P4    [Invited] W. Khunsin, P. Lovera, G. Redmond, C. M. Sotomayor Torres, M. Scharrer, L. Aagesen, R. P. H. Chang, and S. G. Romanov
Excitation-power dependence of luminescence in ZnO inverted opals with structural defects
Proc. SPIE 2008, 6989, 69890R.

P3    W. Khunsin, G. Kocher, S. G. Romanov, and C. M. Sotomayor Torres
Improving the opal-based photonic crystals by noise-assisted crystallization
Proc. SPIE 2008, 6793, 67930B.

P2     A. Amann, W. Khunsin, G. Kocher, C. M. Sotomayor Torres, and E. P. O’Reilly
Stochastic Resonance in Photonic Crystal Growth
Proc. SPIE. 2007, 6603, 660321.

P1     G. Kocher, W. Khunsin, S. G. Romanov, K. Vynck, S. Arpiainen, B. Lange, J. Ye F. Jonsson, D. Cassagne, R. Zentel, J. Ahopelto, C. M. Sotomayor Torres
2D Photonic Defect Layers in 3D Inverted Opals on Si Platforms
Proc. IEEE ICTON. 2006, 2, 68.

 

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Conference Presentations

 

Talks

O27

S. Bhansali, W. Khunsin, J. S. Reparaz, J. Roqueta, J. Santiso, P. O. Vaccaro, A. Goni, P. D. Chao, M. Martin-Gonzalez, and Clivia M. Sotomayor Torres, Large Thermoelectric figure of merit of lightly doped Nb: SrTiO3 thin films. International School of Statistical Physics: 1st Course on Energy Harvesting at micro and nanoscales, Erice, Italy, 23-27 July 2012.

O26

[Lecture] W. Khunsin, Nanometrology tools for self-assembled and patterned nanostructures, Transpyrenees Action on Advanced Infrastructures for Nanosciences and Nanotechnologies (TRAIN2) Workshop, Barcelona, Spain, 3-4 May 2012.

O25

W. Khunsin, J. Dorfmüller, M. Esslinger, R. Vogelgesang, C. Rockstuhl, C. Etrich, F. Lederer,        H. Giessen, and K. Kern, Glimpsing non-radiative plasmonic dark modes in the near field: exciting the unexcitable, the Fifth International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (Metamaterials’2011), Barcelona, Spain, 10 – 15 October 2011.

O24

[Invited] R. Vogelgesang, W. Khunsin, B. Brian, J. Dorfmüller, M. Eßlinger, C. Etrich, C. Rockstuhl, A. Dmitriev, and K. Kern, Apertureless near-field optical microscopy investigations of long-range indirect interactions in unordered metamaterials, the Fifth International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (Metamaterials’2011), Barcelona, Spain, 10 – 15 October 2011.

O23

T. Kehoe, N. Kehagias, D. Borah, M. Morris, W. Khunsin, A. Amann, and C. M. Sotomayor Torres, Quantification of Order in Self-Assembled Block Co-Polymer Films, 37th International Conference on Micro and Nano Engineering, Berlin, Germany, 19 – 23 September 2011

O22

J. Dorfmüller, D. Dregely, M. Eßlinger, W.Khunsin, R. Vogelgesang, K. Kern, and H. Giessen, Near-field imaging of optical Yagi-Uda nanoantennas. The 5th International Conference on Surface Plasmon Photonics, Busan, South Korea, 15 - 20 May, 2011.

O21

W. Khunsin, J. Dorfmüller, R. Vogelgesang, C. Rockstuhl, B. Björn, A. Dmitriev, F. Lederer, and K. Kern, Localized vs global excitation – the influence on local field response, 11th International Conference on Near-field Optics, Nanophotonics and Related Techniques, Beijing, China, 28 August – 2 September 2010.

O20

M. Esslinger, J. Dorfmüller, W. Khunsin, R. Vogelgesang, and K. Kern, Background-Free Imaging with an Apertureless Scanning Nearfield Optical Microscopy, The 11th International conference on Near-field Optics, Nanophotonics and Related Techniques, Beijing, China, August 29 - September 2, 2010.

O19

S. G. Romanov, U. Peschel, W. Khunsin, S. Essig, and K. Busch, Polarization anisotropy and cross-polarized transmission in thin film opal-based photonic crystals, Photonic Crystal Materials and Devices, Brussels, Belgium,  12 – 15 April, 2010.

O18

R. Vogelgesang, J. Dorfmüller, W. Khunsin, C. Rockstuhl, and K. Kern,  Analytic Theory of Linear Plasmonic, Meta’10, 2nd International Conference on Metamaterials, Photonic Crystals and Plasmonics, Cairo, Egypt, 22 – 25 February 2010.

O17

[Invited] C. Rockstuhl, C. Etrich, C. Helgert, C. Menzel, T. Paul, S. Fahr, T. Pertsch, J. Dorfmüller, R. Esteban, W. Khunsin, R. Vogelgesang, K. Kern, A. Dmitriev, K. Bittkau, T. Beckers, R. Carius and F. Lederer, Large scale simulations in the realm of nanooptics, SPIE Photonics West, San Francisco, California, United States, 23 – 28 January 2010.

O16

Jens Dorfmüller, Ralf Vogelgesang, R. Thomas Weitz, Worawut Khunsin, Carsten Rockstuhl, Christoph Etrich, Thomas Pertsch, Falk Lederer, Klaus Kern, Near-Field Investigation of Plasmonic Nano-Wire Eigenmodes, The fourth International Conference on Surface Plasmon Photonics (SPP4), Amsterdam, The Netherlands, 21 - 26 June, 2009.

O15

W. Khunsin, G. Kocher, A. Amann, E. P. O'Reilly, S. G. Romanov, S. Pullteap, H. C Seat, R. Zentel, and C. M. Sotomayor Torres, Quantification of Order in Self-assembly of Colloidal Crystals, MRS Spring Meeting, San Francisco, CA, USA, 13 – 17 April 2009.

O14

[Invited]B. Ding, W. Khunsin, M. Bardosova, I. Povey, M. E. Pemble, and S. G. Romanov, Transmission spectrum transformation in photonic hetero-crystal interfaces, The 10th International Conference on Transparent Optical Networks, Athens, Greece, 22 - 26 June, 2008.

O13

[Invited]W. Khunsin, P. Lovera, G. Redmond, S. G. Romanov, C. M. Sotomayor Torres, M. Scharrer, L. Aagesen, and R. P. H. Chang, Excitation-power dependence of luminescence in ZnO inverted opals with structural defects, Photonics Europe, Strasbourg, France, 7 - 11 April, 2008.

O12

W. Khunsin, S. G. Romanov, and C.M. Sotomayor Torres, Approaching quantitative optical diffraction analysis of crystal lattices in opal films,Photonics Europe, Strasbourg, France, 7 - 11 April, 2008.

O11

W. Khunsin, G. Kocher, S. G. Romanov, and C. M. Sotomayor Torres, Improving the opal-based photonic crystals by noise-assisted crystallization,International Conference and Workshop on Photonics and Nanotechnology (ICPN), Pattaya, Thailand, 16 - 18 December, 2007.

O10

G. Kocher, S. Arpiainen, W. Khunsin, J. Romero Vivas, K. Vynck, B. Lange, M. Mulot, F. Jonsson, J. Ye, S. G. Romanov, T. Charvolin, E. Hadji, D. Cassagne, R. Zentel, J. Ahopelto and C. M. Sotomayor Torres, Integration of SOI-based waveguides, 2D- and Si-based 3D photonic crystals, Workshop on advances on photonic crystals, , COST Action P11: Physics of Linear, Non-linear and Active Photonic Crystals, Capri, Italy, 28 - 30 September, 2007.

O9

W. Khunsin, M. Scharrer, L. Aagesen, S. G. Romanov, R. P. H. Chang, and C. M. Sotomayor Torres, Linear and possible non-linear suppression of near-UV emission in ZnO inverted opal structures, , CLEO/Europe-IQEC Conference, 17 - 22 June, 2007.

O8

G. Kocher, W. Khunsin, S. G. Romanov, C. M. Sotomayor Torres, J. Ye, B. Langer, R. Zentel, S. Arpiainen, M. Mulot, J. Ahopelto, D. A. Kurdyukov, V. G. Golubev, N. Gaponik, A. Eychmueller, and S. B. Newcomb, Light emitting inverted silicon opals on an integration silicon-on-insulator platform, MRS-Europe, Strasbourg, France, May 28 - June 2, 2007.

O7

[Invited]G. Kocher, W. Khunsin, J. Romero Vivas, K. Vynck, S. Arpiainen, S. G. Romanov, B. Lange, M. Mulot, F. Jonsson, T. Charvolin, E. Hajdi, D. Cassagne, R. Zentel, J. Ahopelto, C. M.Sotomayor Torres, Integration of SOI-based 2D- and Si-based 3D photonic crystals, The 211th Meeting of the Electrochemical Society, Chicago, United States, 6 - 11 May, 2007.

O6

W. Khunsin, S. G. Romanov, J. Ye, R. Zentel and C. M. Sotomayor Torres, PBG transmission anisotropy in thin-film colloidal Photonic Crystals, European Optical Society (EOS) 1st scientific annual meeting, Paris, 16 - 19 October, 2006.

O5

[Contributed] W. Khunsin, M. Scharrer, L. Aagesen, S. G. Romanov, R. P. H. Chang, and C. M. Sotomayor Torres, Low-power all-optical control of photonic bandgap in inverted ZnO opal, PhOREMOST 2nd annual meeting, 26 - 29 September, 2006.

O4

[Invited] W. Khunsin, P. Lovera, G. Redmond, S. G. Romanov, C. M. Sotomayor Torres, M. Scharrer, L. Aagesen, and R. P. H. Chang, Excitation-power dependence of luminescence in ZnO inverted opals with structural defects, Photonics Europe, Strasbourg, France, 7 – 11 April 2008.

O3

S. G. Romanov, W. Khunsin , C. M. Sotomayor Torres, J. Ye, and R. Zentel, Photonic hetero-crystals based on opal films, , 12th Conference on Laser Optics, St. Petersburg, Russia, 26 - 30 June, 2006

O2

[Invited] G. Kocher, W. Khunsin, J. Romero Vivas, K. Vynck, S. Arpiainen, S. G. Romanov, B. Lange, M. Mulot, F. Jonsson, T. Charvolin, E. Hajdi, D. Cassagne, R. Zentel, J. Ahopelto, C. M. Sotomayor Torres, Integration of SOI-based 2D- and Si-based 3D photonic crystals, the211th Meeting of the Electrochemical Society, Chicago, United States, 6 – 11 May 2007.

O1

G. Kocher, W. Khunsin, S. G. Romanov, K. Vynck, S. Arpiainen, B. Lange, J. Ye, F. Jonsson, D. Cassagne, R. Zentel, J. Ahopelto, and C. M. Sotomayor Torres, 2D photonic defect layers in 3D inverted opals on Si platforms, 8th International Conference on Transparent Optical Networks, 19 – 22 June 2006.

 

 

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Posters

 

 

 

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